2e81492b8a
IrreducibleGraph is the explicit graph of a region -- a loop, or the whole function -- that BFI searches for irreducible SCCs. It maintains predecessor lists only so findIrreducibleHeaders can ask of each node whether a predecessor lies outside its SCC (an entry), and whether a non-entry in the same SCC reaches it via a backedge (an extra header). Answer both from the successor lists instead; IrrNode then needs only a successor vector. findIrreducibleHeaders is left partitioning the SCC its sole caller is packaging, so fold it into createIrreducibleLoop. Headers and members are sorted, so the changed iteration order does not affect output. Once BFI uses CycleInfo, a region's irreducible SCCs are its non-reducible child cycles, which should let IrreducibleGraph go away entirely. That removal has no predecessor lists to walk and getResolvedNode has no inverse, so it must sweep successors regardless; settling the formulation here leaves it changing only the graph. Aided by Claude Opus 5 |
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| flang | ||
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| libc | ||
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| lld | ||
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| llvm | ||
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| offload | ||
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| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
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| pyproject.toml | ||
| README.md | ||
| SECURITY.md | ||
The LLVM Compiler Infrastructure
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called "LLVM". This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Getting the Source Code and Building LLVM
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Getting in touch
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.